Semiconductor device connected by anisotropic conductive film

Abstract

A semiconductor device connected by an anisotropic conductive film, the anisotropic conductive film including a polyurethane resin; at least one other resin selected from the group of an ethylene-vinyl acetate copolymer resin, an acrylonitrile resin, and a styrene resin; isobornyl acrylate; and conductive particles.

What is claimed is: 
     
       1. A device, comprising:
 a first connecting member that includes a first electrode; 
 a second connecting member that includes a second electrode; and 
 an anisotropic conductive film connecting the first connecting member and the second connecting member, wherein the first connecting member is one of a glass substrate, a PCB, a fPCB, a COF, a TCP or an ITO glass substrate, the second connection member is one of a glass substrate, a PCB, a fPCB, a COF, a TCP or an ITO glass substrate, and the anisotropic conductive film is between the first connecting member and the second connecting member, the anisotropic conductive film comprising: 
 about 30 wt % to about 80 wt % of a polyurethane resin; 
 about 1 wt % to about 40 wt % of at least one other resin selected from the group of an ethylene-vinyl acetate copolymer resin, an acrylonitrile resin, and a styrene resin; 
 about 5 wt % to 15 wt % of isobornyl acrylate; and 
 about 0.1 wt % to about 15 wt % of conductive particles, all amounts being in terms of solid content, wherein: 
 the polyurethane resin, the at least one other resin, and the isobornyl acrylate are present in a ratio (X/Y) of a total weight (X) of the polyurethane resin, the at least one other resin, and the isobornyl acrylate to a weight (Y) of the isobornyl acrylate in the range of 6.33 to about 20, in terms of solid content, 
 unevenness on a rear side of a compressed surface of the anisotropic conductive film has a maximum height of about 2 μm or more and has an average height of about 0.4 μm or more, when the anisotropic conductive film is compressed onto an adherend under following conditions: 
 (a) pre-compression: at about 50° C. to about 70° C. for about 1 to about 5 seconds under a load of about 1.0 Mpa to about 5.0 Mpa, and 
 (b) primary compression: at about 110° C. to about 150° C. for about 1 to about 7 seconds under a load of about 1.0 Mpa to about 4.0 Mpa, and 
 the anisotropic conductive film has an adhesive strength of about 800 gf/cm or more, as measured after being subjected to a primary compression at about 110° C. to about 150° C. for about 1 to about 7 seconds under a load of about 1.0 MPa to about 4.0 MPa and then left at 85° C. and 85% RH for 500 hours. 
 
     
     
       2. The device as claimed in  claim 1 , wherein the unevenness on the rear side of the compressed surface of the anisotropic conductive film has a maximum height of about 2 μm to about 4.12 μm. 
     
     
       3. The device as claimed in  claim 1 , wherein the unevenness on the rear side of the compressed surface of the anisotropic conductive film has an average height of about 0.4 μM to about 1.22 μm. 
     
     
       4. The device as claimed in  claim 1 , wherein the adherend is a printed circuit board. 
     
     
       5. The device as claimed in  claim 1 , wherein a total amount of the polyurethane resin and the at least one other resin in the anisotropic conductive film is about 60 wt % to about 90 wt %, based on a total weight of the anisotropic conductive film in terms of solid content. 
     
     
       6. The device as claimed in  claim 1 , wherein the isobornyl acrylate is present in the anisotropic conductive film in an amount of about 1 wt % to about 25 wt %, based on a total weight of the anisotropic conductive film in terms of solid content. 
     
     
       7. The device as claimed in  claim 1 , wherein the anisotropic conductive film further includes organic particles or inorganic particles. 
     
     
       8. The device as claimed in  claim 7 , wherein the organic particles or inorganic particles are present in the anisotropic conductive film in an amount of about 1 wt % to about 30 wt %, based on a total weight of the anisotropic conductive film in terms of solid content. 
     
     
       9. The device as claimed in  claim 7 , wherein the anisotropic conductive film includes:
 55 wt % to 70 wt % of polyurethane acrylate; 
 5 wt % to 15 wt % of the at least one other resin selected from the group of an ethylene-vinyl acetate copolymer resin, an acrylonitrile resin, and a styrene resin; 
 the 5 wt % to 15 wt % of the isobornyl acrylate; 
 10 wt % to 15 wt % of the organic particles, and 
 the about 0.1 wt % to about 15 wt % of the conductive particles, all amounts being in terms of solid content.